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Home » Rocks



ROCKS: IGNEOUS, METAMORPHIC AND SEDIMENTARY


ROCKS HOLD THE HISTORY OF THE EARTH AND THE MATERIALS THAT WILL BE USED TO BUILD
ITS FUTURE.


Igneous
Igneous Rocks: Photos, descriptions and facts about intrusive and extrusive
igneous rocks.



Andesite

Basalt

Dacite

Diabase

Diorite

Gabbro

Granite

Obsidian

Pegmatite

Peridotite

Pumice

Rhyolite

Scoria

Tuff

Unakite
Metamorphic
Metamorphic Rocks: Photos, descriptions and facts about foliated and
non-foliated metamorphic rocks.



Amphibolite

Anthracite

Gneiss

Hornfels

Lapis Lazuli

Marble

Mariposite

Novaculite

Phyllite

Quartzite

Schist

Skarn

Slate

Soapstone

Verdite
Sedimentary
Sedimentary Rocks: Photos and facts about clastic, chemical and organic
sedimentary rocks.



Breccia

Caliche

Chalk

Chert

Coal

Conglomerate

Diatomite

Dolomite

Flint

Iron Ore

Limestone

Rock Salt

Sandstone

Shale

Siltstone

Difficult Rocks

Difficult Rocks Elementary students find lots of rocks that you will not be able
to identify.
Fossils

Fossils are remains, traces or imprints of ancient life. They reveal Earth's
biological history.
Geodes

Geodes look like ordinary rocks on the outside but can be spectacular inside!
Tumbled Stones

Tumbled Stones are rocks that have been rounded, smoothed and polished in a rock
tumbler.
Gifts That Rock

Gifts That Rock - What are the most popular gift items in the Geology.com store?
Rock and Mineral Kits

Rock, Mineral and Fossil Collections. Specimens for personal or classroom use.
Fluorescent Minerals

Fluorescent Minerals and rocks glow with spectacular colors under ultraviolet
light.
Flint, Chert, Jasper

Flint, Chert, and Jasper are types of chalcedony and names for microcrystalline
quartz.
Quartzite

Quartzite a nonfoliated metamorphic rock composed almost entirely of quartz.
The Brewery Rock ?

The Rock Used to Make Beer - Geologists are beer experts and should know about
this rock.
Lapis Lazuli

Lapis Lazuli - a metamorphic rock and the most popular blue opaque gemstone in
history.
Trap Rock

Trap Rock is a name applied to any dark-colored igneous rock used to produce
crushed stone.
Charoitite

Charoitite - a purple metamorphic rock dominated by the mineral charoite. It is
used as a gem.
Rock Salt

Rock Salt is a sedimentary rock composed of the mineral halite. It has many
uses!
Sand Grains

A Grain of Sand Gallery of sand grains through a microscope by Dr. Gary
Greenberg.
Shale

Shale The rock that is quickly transforming the energy industry.
Hardness Picks

Hardness Picks - Test for hardness with precise and easy-to-use hardness picks.
Puddingstone

Puddingstone - a conglomerate with clasts that contrast in color with the
matrix. Alamy Images.
Geology Dictionary

Geology Dictionary - contains thousands of geological terms with their
definitions.
Rock Tumbling

Rock Tumblers - All about rock tumblers and rock tumbling. Read before you buy a
tumbler.
Sliding Rocks

Sliding Rocks on Racetrack Playa How they slide across a dry lake bed is a
mystery.
Don*t Go To Jail

Rock Collectors must know the rules before removing rocks from public and
private property.
Rock Art

Rock Art People have been producing rock art for thousands of years. A
world-wide collection.
Soapstone

Soapstone is a talc-rich rock with properties that make it suitable for a
variety of projects.
Uses of Granite

Uses of Granite The rock used everywhere from the kitchen to the facing stone of
skyscrapers.
Sand Photo Collection

Sand from Around the World . A photo gallery showing the diversity of the
material we call "sand".
Rock-Forming Minerals

Rock-Forming Minerals - most of Earth*s crust is made up of a small number of
minerals.
Antarctic Meteorites

The Richest Meteorite Field - More meteorites found here than anywhere else on
Earth.
Coquina

Coquina - A porous limestone composed almost entirely of fossil debris.
Mariposite

Mariposite - a name used for green chromium-rich micas and certain rocks colored
by them.
Siltstone

Siltstone is a sedimentary rock composed mainly of silt-sized particles.
Crushed Stone

The Unsung Mineral Hero - and the commodity upon which almost everything is
built.
Gold Panning Kits

Gold Pans and Panning Kits - classifiers, snuffer bottles. Learn how to pan for
gold!
Igneous and Volcanic

Igneous and Volcanic Features an introduction to how these rocks occur below and
above ground.
Rockfall

Spectacular Yosemite Rockfall A photo sequence of rockfall and debris avalanche
by Herb Dunn.
Oil Sands

Oil Sands contain oil in the form of bitumen - a major oil resource that can be
difficult to produce.
Tucson Show

Mineral Show Photos From the 2010 Tucson Gem, Mineral & Fossil Show.
Chalk

Chalk is a variety of limestone formed from fine-grained marine sediment known
as ooze.
Pictographs

What Are Pictographs? They are drawings or paintings on rocks made by people.
Caliche

Caliche is a lithified layer in soil or sediment. It is considered to be a
sedimentary rock.
Unakite

Unakite is a metamorphosed granite composed of green epidote and pink
orthoclase.
Geology Tools

Geology Tools - Rock hammers, field bags, hand lenses, maps, hardness picks,
gold pans.
Curling Stones

Curling Stones are made from a special type of granite, found at just a few
locations worldwide.
Rocks on Mars

Rocks on Mars Many of the rocks found on Mars are not very different from Earth
rocks.
Dacite

Dacite - a light-colored extrusive igneous rock intermediate between rhyolite
and andesite.
Limestone

Limestone A versatile rock used in cement, food, paint, paper, drugs, concrete &
more!
Coal Close Up

Coal Through a Microscope Coal is more than a black rock. It\'s THE most
interesting rock.
Forensic Geology

Forensic Geology My students come to class thinking that dirt is dirt and sand
is sand...
Hand Lens

Hand Lens A 10-power folding magnifier in a metal case. A frequently used lab
and field tool.
Azurite Granite ?

Azurite Granite? Found at the base of K2, the second highest mountain in the
world.
Diabase

Diabase - the rock selected for Stonehenge and transported 240 miles in 2100 BC.
 

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